The Ethical Slut is a book about how to love or have sex with multiple people in a responsible, mutually enjoyable way. The book contains hardcore relationship skills, many of which generalize well to monogamous marriages, sibling relationships, and other contexts.

As a generic phrase, "ethical sluts" are people with high touch needs who crave lots of sex and/or snuggling, often with multiple partners, and who wish to meet their needs in safe and fulfilling ways.